Paper-bag machine.



1 M. VIERENGBL & J. SOPGE.

PAPER BAG MACHINE. APPLIOATION FILED SEPT.11,1909.

Patented May 24, 1910.

6 SHEETS-SHEET 1.

hwaaw M. VIERENGEL & J. SOPGE.

PAPER BAG MACHINE.

APPLIUATION FILED SEPT.11,1909.

Patented May 24, 1910.

s sums-sum 2.

Snuanfozd- Wit" 0% M. VIERENGEL & J. SOFGE.

Patented May 24, 1910.

6 SHEETS-SHEET 3.

M. VIBRENGBL & J. SOFGE. PAPER BAG MACHINE.

APPLICATION FILED SEPT. 11,1909. 958,844, Patented May 24; 1910.

6 SHEETS-SHEET 4.

F IFIFIB nucntov- W- flwom M. VIERBNGEL 8; J. SOFGE.

PAPER BAG MACHINE.

APPLIOATIOR FILED SEPT. 11, 1909.

Patented May 24, 1910.

6 SHEETS-SHEET 5.

M. VIERENGEL & J. SOPGE.

PAPER BAG MACHINE.

APPLIOATION FILED SEPT. 11, 1909.

958,844. Patented May 24, 1910.

6 SHEETS-SHEET 6.

witnesses UNITED sTA Es PATENT OFFICE.

MATTHEW VIERENGEL, OF BROOKLYN, NEW YORK, AND JOHN SOFGE, 0F CINCINNATI, OHIO, ASSIGNORS, BY MESNE ASSIGNMENTS, T0 CHARLES E. ROTH, TRUSTEE, OF

' CINCINNATI, OHIO.

PAPER-BAG MACHINE.

- Patented May 24, 1910.

Application filed September 11, 1909. Serial No. 517,257.

To all whom it may concern:

Be it known that we, hh'rrnnw VIEREN- can, a citizen of the United States, residing at borough of Brooklyn, in the county of Kings and State. of New York, and JOHN Soron, a citizen of the United States, and residing at Cincinnati, in the county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Papcr-Bag Machines, of which the following s a specification.

Our invention relates to an improvement in paper bag machines, primarily to that type in which a roll of paper is mounted at one end and in which the continuous sheet is fed between a series of rolls and devices for printing, cutting, gumming, folding and delivering a complete bagat the opposite end of the machine.

One of the objects of our invention is to.

provide a machine for making paper bags of duplex form, that is, one bagwithin another in Which the inner bag is foldedtransversely to that of the outer bag to prevent the bag from having coincident seams.

Another object of our invention is to provide a paper bag machine, whereby two independent bags are formed and in which the outer is cut and printed, and the inner is paraffined and cut to make the same m'oisture-proof, together with means for bringing the two bags together, one above the other, for simultaneously folding the same one within the other.-

Another object of our invention is to provide a paper bag machine for forming aduplex ag inwhicli one is. folded transversoly to that of the other, and the same brou ht together, one over the other, and in whicll the one is fed proportionately faster than the other to a point to aline the same with each other, after which both are simultaneously operated upon in a continuous -operation. i

Another object of our invention is to provide a )aper bag machine for forming bags of dup ex form, one bag within another, in which the open ends of the whole bag are formed so as to project the open edges on one side beyond that of the opposite edges.

Another object of our invention is to provide a paper bag machine with means for folding one side of the bag in advance of the other in folding a bag of duplex form,.

in which the sides are formed, the one transverse to the other, with means for frictionally gri ping and feeding oneside 0f the duiplex orm during the fold of the opposite s1 es.

Another object of our invention is to provide the cutting rolls of a paper bag machine, With means for maintaining the waste or cut out stock against the periphery of one of the cutting rolls until a completed out has been made and carrying the same to a point of discharge.

Another object of our invention relates to the organization ofa paper bag machine for forming a bag of duplex form, in which both bags are formed from continuous rolls of'paper, in which the outer is maintained in a continuous strip, and the inner iscut into individual bag formation and properly placed upon the continuous strip relatively thereto, to form a bag with the sides formed of transverse folds to each other, to enable the proper feeding of the two bags for simultaneous folding, and in a continuous operation.

I The features of our invention, are more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which V Figure l is a side elevation of our paper bag machine with the discharge end of the machine being to the right hand. Fig. 2 represents an elevation upon the opposite side to that shown in Fig. l, with the printing mechanism merely represented by a. se ries of rolls beneath the ba folding and formin mechanism. Fig. 3 1s an enlarged sectiona elevation through the gumming and cutting rolls, for gumming and cutting the inner bag blank. Fig. 4 is a section on line as, m, Fig. 3. Fig. 5 is a top plan View of the folding mechanism. Fig, 6 is a section on line w, w, Fig. 5. Fig. 7 is a plan view of a duplex aper bag after the first step of folding. Fig. 8 is a detailed sectional elevation, through the rotary carrier mechanism, for final gumming and folding of the completed bag. Fig. 9 is a section through the rotary carrier cylinder, shown in Fig. 8. Fig. 10 is an inside elevation of the cam for governing the operation of the grippers and fingers carried b the rotary carrler cylinder. Fig. 11 is a p an view of a duplex bag with the sides of the inner bag and flaps of the outer bag in their'folded position, the second step of folding. Fig.-

12 is a section on line 1), c, Fig. 9. Fig. 13 1 ing fixed upon shaftll, and receives motion is .a sectional elevation, through the outeri therefrom, bag cutting roll and support-therefor. Fig.

14 is a detailed side elevation of'a cam and lever mechanism, for operating the finger carried by the outer bag cutting roll. Fig. 15 is a section on line a, a, Fig. 13. Fig. 16 is a section on line a, a, Fig. 12. Fig. 17 is a detail sectional View of one of the inner bag cutting rolls, illustrating the means for discharging the surplus stock.

In the paper bag machine, illustrated by the drawin s, a duplex bag is made and primarily t e inner bag. sides are folded transversely to that of the outer. It is obvious, however, that the mechanism can be changed, without 'departing from the features of our invention, to make a duplex to be driven from any source of bag of different construction, which change would be principally in the cutting rolls, to form a blank of any desired outline.

We have not illustrated the mechanism in detail for printing the outer bag, the same being of well-known construction and upon the lines of ordinary printing machines. Likewise, we have. not illustrated in detail the means for parafiining the paper, or water-proofing the same, employed in the machine, as it is obvious that such roll of paper previously treated can be supplied to the machine, without afiecting the features of our invention.

The various parts of the machine are driven from a single source of ,power, through trains of gears, illustrated in Figs.

.1 and 2, in which :-1 represents the main driving shaft, having a pulley fixed thereon ower. 3 represents a pinion in mesh wit gear 4, driving the printin roll 5. 6 is agear in mesh with gear- 4, or driving the printing roll 7. In this machine, two sets of printin rolls are employed, adapting the machlne for various classes of printing, essential and desirable in makin paper bags of a class, known as tobacco ags. 8 represents an intermediate gear in mesh with gear 4, and compound gear 9, one member of the compound gear 9 bein in mesh with a gear 10, on its shaft 11', or driving the cutting rolls of the inner bag. The various shafts and parts of the machines are jour-.

naled and fixed to the side frames 12, and alined thereon to adapt the machine to form a continuous operation of making a duplex bag, from two rolls of paper, supported at one end of the frame and delivering a finished printed duplex bag at the opposite end of the frame.-

We will first describe the means employed for making the inner bag and delivering it to a point where the inner and outer bag are joined. 13, 14, represent a pair of rotating cutting rolls, for forming a blank of desired shape for the inner'bag, roll 13 begumming operation takes said shaft being journaled in the brackets 16, supported upon the side frames 12. 17 represents a gear fixed upon shaft 11, in mesh with a gear 18, fixed upon shaft 19, upon which shaft the companion cuttin roll 14 is mounted. This shaft is preferaily mounted or .journaled in the slideboxes 20, slidably mounted within the brackets 16. 21 represents springs for creating a downward tension upon said slideboxes for yieldingly maintaining roll 14 in contact with roll 13. The cutting rolls are provided upontheir eripheries with the usual cuttin blades and slot, common in machines for b anking paper. In cutting rolls of this class, where they serve as dies for forming a paper blank, and especially such forms in which small strips of surplus paper are cut out, it has been quite difficult to take care of this surplus stock to prevent the same from becoming clogged with the various parts of the machine. To successfully carry away this sur lus stock, we have provided the cutting r0ll 13, with one or more pins 22, projecting from the periphery of the roll 13, and between the cutter blades, producing a notched cut in the strip of paper upon eachside thereof, practically severing the strip and forming the desired outline of the two adjacent bag blanks for the inner bag, and severin waste material or stock between the blades from the strip. The pins engage during the revolution of the rollers into coinci dent orifices formed upon the roll 14, thereby piercing the waste material of the strip of paper and maintain the same upon the periphery of the roll 13 during a portion of its revolution. The roll 13 is provided with a series of circumferential grooves, into each of which a finger 22 projects (see Fig. 17), the fingers being suitably mounted and form guides leading into a discharge chute. The free ends of the fingers engage beneath the cut-away or waste material adhering to the roll 13, so as to guide the paper off of the roll and into the discharge chute, and thencecarried away by suction through the discharge chute. The strip of paper 23, as it comes from the water-proofing mechanism, passes over a carrier roll 24, to the cutting roll 14, and between said roll 14 and cutting roll 13, between which it is cut by I to the cutting of the blank and while the paper is still in a continuous strip. Thus, as illustrated in the drawin s, Fig. '3, the ace while the strip of paper is fed over roii 14. The umming mechanism is of the usual form of construction employed in bag or envelop machines, comprising a disk 25, or, series of disks, as in this instance, fixed upon ,a shaft 26, said shaft being yieldingl-y mounted upon the swinging bracket arms 27 in order that the disks may be maintained in contact with the roll 14, and the supply roll 28, said supply roll revolving in a reservoir 29', containing the glue. 30 represents a scraper adjustab regulating the supply of glue upon said roll.

The gumming disks and their supply roll ,are driven, as follows, see Fig. 2. 31 represents a ear on shaft, 26, see Fig. 2, in mesh wit gear 18 on the cutting roll shaft 19. 32 represents a sprocket wheel fixed on shaft 26, carryingthe gumming disks 25, and 33 represents a sprocket chain engaging with the sprocket wheel 32, and sprocket wheel 34, fixed on the shaft 35, carrying the supply roll 28. 36 represents an' intermediate sprocket wheel in engagementwith the sprocket chain 33, serving as a chain tightener therefor. Thus, motion is transmitted to the 'gumining mechanism from the main driving shaft 1, through gears 3, 4, 8, and compound intermediate 9, gear 10, shaft 11, to the opposite side of the frame, through gears 17 and 18, and gear 31 on shaft 26 carrying the gumming disks, and thence through the sprocket chain and wheels for driving the supply roll. The blank for forming the bag, after leaving the cutting rolls 13, 14, moves forward between the tension rolls 37, 38, see Figs. 1, 2 and 3, carried by their respectivev shafts 39,- 40, journaled in bearings formed in the bearmg supports 41. The shaft 40 is yiel'dingly mounted in sliding blocks, slidably supportedin the bracket supports 41, and maintained under downward pressure by a sprin similar in construction as the mounting or shaft 19, carrying the cutting ,roll 14, for yieldingl maintaining the tension or guide rolls 3 38, in frictional contact with each other. Roll 38 is provided with grooves for forming a clearance for the asted surface of the blank for the inner ag. At this point, the. blank strip for forming the outer bag meets with the inner bag blank, the outer bag strip being fed from the printing roll and the cutting rolls to roll 37, so as'to be fed beneath the inner bag blank, and from which point the marginal cut strip of outer bag and inner bagblank are carried forward for simultaneous opera tion to form a completed bag. l

The outer bag strip from the supply roll, travels the following course, see Fig. 2. From the, -supplv roll, not shown, it passes over a-guide roll 42, between the printing rolls 5, 7, driven, as heretofore described, and of general form of construction for printing one side of the, ba from whence the strip passes. to the printlng rolls 43, 44, for printing the opposite side of the bag,

and from thence upward between the cutting rolls 45, 46, of general. construction, for

e 'toand from the supply roll 28, for

outer ba s, but leaving the strip in its continuous orm. From these cutting rolls the strip is fed to the tension rolls 37, 38, heretofore described, meeting with the inner bag blank.

The printing rolls 5, 7, and 43, 44, are of general form, in which one is provided with a padded periphery, while the other contains an electrotype-plate. These rolls are so arranged that the printing is all done upon one side of the strip, but when the bag is finished, both sides of the bag are prlnted. The duplex sets of printing rolls are also provided for printing in different colors, upon the same surface, as each electrotype-roll can be of sufficient diameter, so that its circumference will print upon a sufficient length of the strip to cover the printing surface desired upon both sides of a completed bag. As the printing mechanism and cutting mechanism for cutting the outside marginal outline of the outer bag are of well-known construction and not forming a part of this invention, onl so far as it relates to the combination 0 an entire machine, a detailed description of the same is unnecessary.

The travel of the cut strip for the'outer bag in forming a paper bag of duplex form in which the sides are formed by folding one transverse to that of the other, is faster than the feed of the cut blank, forming the inner lining or inner bag, this being necessary to bring the two into proper relative alinement. The relative faster feed of the cut strip over that of the cut blank is accomplished through the trains of gearin of diflerent diameter between the sha carrying the compound gear 9 and the shafts 11 and 39, driving the rolls 13 and 37 respectively. This differential speed betweenthe out strip and cut blank being necessiblank and the edges of the inner bag blank upon their respective opposin bag sides, accomplishing the folds, as il ustrated in .Figs. 7 and 11, one side folding operation being in advance of the other, with tension roller so disposed as to maintain the inner and outer ba blanks in relative alinement with each ot er, and a continuity of feed.

47, 48, represent guide strips leading from the tension-rollers 37 38, and 49, 50, represent guide plates, each provided with a guide-wa 51, upon which the outer bag strip an the inner bag blank travel, and beneath the uide strips 47 and 48. 52 re cutting the outside marginal outline of the l resents a fol der, comprising a spiral bla e, 13L

for. turnin over the flap v53, see Fig. 7, of the outer agand the side ortion 54 of the-inner bag. During this olding action,

the ,o posite sides of the inner and outer ba b anks travel between a pair oftension rol ers 55. 56 represents a folder upon the opposite side fromfolder 52, and in a rearward position therefrom, for folding over the opposite side of the blanks. 57 represents a pair of tension rollers o positethe folder 56, for maintaining the almement of the two ba .relative to each other during the second olding operation and their continuous feed, and 58 represents a pair of tension rollers in rear of the folder 56, for continuing the feed and relative alinement of the two bags, until they are within the grasp of a rotary carrying cylinder 59. It is desirable to have the tension rollers 55, 57 and 58, positively'rotated to feed the. paper forward between the frictional contact of each set of these friction rollers. This is accomplished as follows :Each set is a duplicate of.the other, and therefore, a description of, the one will serve for all. 60 represents a shaft journaled in the supports 61, u on each side of the main frame 12, to whic 'is fixed the lower friction roller 62 of the set,: and 63' represents a sprocket wheel fixed to the shaft60, for transmitting motion thereto'. represents a gear fixed to shaft 60, in mesh with a gear 65, fixed to the" shaft 66. Said shaft 66 carrying the upper friction roller 67, maintained in frictional contact with the lower friction roller 62, their peri heral' meeting surfaces being 1:82 representsa gear wheel fixed to the" on a medlal me between the guide strips 47, and guide-wa 51 upon one side, with the other sets .0 friction rollers along a medial line between the opposite guide strip and way. The shaft 66 has a free bearing-in its support 61", while the opposite end of the shaft is yieldingly su portedin the sleeve bearin 68,, suspends from the cross-'rail 69, an maintained under downward pressure by the, spring 70. I 81 represents a cam lever for releasin the tension or frictional contact between. t e two rollers 62 and 67. Of course, it being obvious that the'two rollers 62-and' 67 may be mounted and'journaled and driven in any well-known manner,

without departing from the features of our invention.

Each set of frictionrollers55, 57 and 58 being provided with a sprocket wheel 63, which receives motion as follows, see Fig.

shaft carrying the printing roll 43, in mesh with'the maindriving gear 3 and gear 83, fixed to a stud shaft 84, said gear 83'is also 1 inmesh with a gear 85, which in turn is in mesh with a gear 86, for revolving the outer bag cutting rollers 46 and 45 respectively.

87 represents a sprocket wheel fixed to the stud'shaft 84, carrying a sprocket chain 88,

stem see Fig. 1. The sprocket chain 88 engaging a with the sprocket wheels 63 of the frictional rollers, for rotating the same. As before set forth, the twobags, one above the other, are fed from the folding mechanism, just described, to. a rotary carrying cylinder, for completing the operation of the duplex bag.

The features and mode of operation of the carrier cylinder and mechanism, are substantially as that shown and described in the patent to Matthew Vierengel, No. 657,257, dated September 4, 1900, except that the carrier herein shown'is of single form-instead of duplex form, differing however in specific details of construction. The carrier cylinder 59 is preferably made of two parts 90 and 91, providing a space between them, see Fig. 9, and between which fingers are mounted for breaking the connection between one bag and the continued strip, and throwing one end of the bag outward, away from the carrier cylinder. The rotary .carrier c linder is mounted u on a shaft 92 1 suitab y journaled in the si e frames of the machine and rotated by means of a gear 93, fixed upon shaft 92, in mesh with an intermediate gear 93, which. in turn, is in mesh with a gear 95, fixed to the shaft carrying one of the printing rolls, see Fig. 1, said gear 95 in turn being in mesh'with gear 82 on theopposite printing shaft, the transmission being from the main driving shaft 1, through gears 3 rotary carrier cylinder shaft 92.

96, 97 re resent grippers, one set upon each side 0' .the rotary carrier cylinder 59,

and arranged to have an action upward,

thence inward, toward'the medial line of the blanks, thence downward to grip the two blanks upon the periphery of the carrier cylinder in rear of the medial line of fold of the outer bag and the bottom flap of the inner bag, for folding the same upon the op posing bag sides. This is accomplished, as follows z- -Each gripper is fixed upon a slideblock 98,-slidably mounted in the yoke-plate 99, fixed to the shaft 92, and rotating therewith, and each slide block is provided with an actuating bar 100 under outward tension against a stationary cam 101, the cam being provided with the-cam surfaces 102 in the arc travel of the actuating bars 100, so as to move. the same toward or ,away from the shaft-.eenten-and the right angle cam surface 104, to move the actuating bars toward the ide of the rotary carrying cylinder.

' illustrated in Fig. 9 two "sets of grippers are employed, one upon each side of the '82, 95 94, and 93, to the carrier cylinder, so as to grip both edges of the formed bag blanks, thereby necessitating the employment of two stationary cams 101, for actuating the bars 100 of each gripper slide bar, 'each bar being maintained under tension in two directions, by means of the coil springs 105, and 106,, spring 105 maintaining to the rotatlon of the carrier cylinder, the

speed of the rotary carrying cylinder being such as to grip two bags in each complete 131 revolution, one set of oppositely disposed grippers being in engagement with the paper while the other set is disengaged.

The carrier cylinder 59 is provided on its periphery with the scoring bars 107, and the cutting bars 108, adapted in their revolution to register with the scoring blade 109, and cutter blade 110 respectively, carried by the I011 111, fixed upon shaft 112, see Fig. 8. The scoring and cuttin roll 111 is preferably made of two sectlons and fixed upon the shaft 112, see Fig. 13, providing a space between them.

113 represents a finger fixed to the actuating rod 114, passing through a bore formed in each section of the scoring and cutting roll 111 for supporting said bar.

115 represents a stationary cam over which the lever 116, fixed to the actuating rod 114 travels, to swing the finger113 outward, to bear against the paper of the succeeding blanks on the carrier cylinder, to prevent the same from being caught between the cutting members of the carrier cylinder, and scoring and cutting roll.

117 represents a spring for maintaining the lever 116, in engagement with the cam sutface. The shaft 112 carrying the scoring and cutting roll 111 is journaled in the slide boxes 119, slidably mounted in supports on the side frames and maintained under downward pressure by the springs 120 for yieldin ly maintaining the scoring and cutting roi 111, en aging with the rotary carrier cylinder, sai shaft 112 being driven by a gear 121, fixed upon one end thereof, in mesh with a gear 93, on the rotary carrier cylinder shaft 92.

122, see Figs. 1, 2 and 8, is a guide roll yieldingly supported or journaled and engaging the periphery of the rotary carrier cylinder 59, for feeding the paper as it 'leaves the folding mechanism, said guide roll being driven by means of a gear. 123, in mesh with gear 93, upon shaft 92, of the rotary carrier cylinder.

124, see Figs. 1, 2 and 8, represents a gumming disk on shaft 125, journaled in a slideyieldingly supported in a swinging bracket 126, upon each side of the frame, aseries of gumm'ing disks bein employed .for properly gummmg the blan s in their final stage, gumming disks 124 engaging with'fsupply roll 127, revolving within the glue reservoir 128, .the gumming disks and their supply roll being rotated by means of a gear 129, fixed to the disk shaft 125, and the sprocket wheels 130, 131, and sprocket chain 132, for connecting the supply roll shaft in driving relation with the disk shaft 125, the construction and operation of the gumming disks and their supply roll being substantially'the same as described for the gumming mechanism for gumming the inner bag ank.

133 represents a guide plate or finger, see Fig. 8, for receiving one side of the outer bag thrown outward away from the carrier cylinder by one of the fingers 134, fixed to the rock shaft 135 journaled in the rotary carrier cylinder 59, so as to permit the same to be folded upon the inward turned flaps of its opposing bag sides. Two fingers are carried by the rotary carrying cylinder, one in advance of each set of grippers, owing to the cylinder performing upon twobags in one revolution. The fingers 135 are each 0 erated by mechanism of similar construction, oppositely .disposed, one set upon each side of the rotary carrier 'cylinder. The rock shaft 135 upon one end is provided with a segment rack gear 136, the teeth of which are in mesh with the rack teeth 137, formed upon one limb of the yoke member 138, the opposite end engaging with the plane periphery of the segment rack gear 136, the' opposite end of sand yoke member straddling shaft 92.

139 represents a roller carried by the yoke member 138, and adapted to engage with the cam surface 140, provided upon each stationary cam 101.

141 re resents a spring, carried by the rock shaft 135, for maintaining the roller 139, in contact with the cam surface 140. Thus, in the rotation of the carrier cylinder, the roller 139 will travel over the cam portion 142, see Fig. 10, of the stationary cam 101, which will cause movement to the yoke member 138, rocking the rock shaft to swing the finger 134 outward.

143 represents a roller maintalned under tension with the peripher of the carrier cylinder 59, to press and old the free side of the outer bag and the bottom flap of the innenbag against their opposing bag slde, carried by the rotary carrler cylinder for completing the bag, from whence the bag is passed between the rollers 144 and 145, for further pressing the completed bag released from the carrier cylinder and del ver it to the collecting a paratus. Thus, as the two bag blanks are did from the folding mechanism to the carrier cylinder 59, andhetween it and the guide roll 122, whence they pass.

between the carrier cylinder and scoring and cutting roll, for scoring both blanks and partially severin the "outer bag blank from its succeeding b ank of strip, gripped by the grippers along the medial 01 of the outer" blank, in rear of the scored line, thence passing, between or beneath the umming disk to a point where the one si e of the outer blank is thrown outward, away from ing mechanism to the carrier cylinder is substantially the same as the operation described in the patent to Matthew Vierengel,

one of the joint inventors herein, No. 657 ,257

dated September 4, 1900, for improvement in bag machine. And asbefore described, the outer bag blank is scored upon a medial line, to form the two sides of the bag, when the blank is folded along the scored line,

one set of grippers engaging the bag blanks filling, (see Fig. 11) in which 150 an in rear of the scored line, leaving one side of the'outer blank free and the bottom flap of the inner bag, enabling the said free side of the outer bag to engage upon the guide plate or finger 133, and thereby carried away from the periphery of the carrier cylinder, after it has been severed by one of the fingers 134 from the preceding bag side. The grippers continue to hold the blanks and serve as folding means in their travel between the carrier cylinder 59 and pressing roll 143, whence they are withdrawn from en agement with the bag sides and the bag fo dingoperation completed by the compression between the carrler cylinder and pressing roll 143, pressing the one side of the outer bag upon the inwardly folded flaps of the op 0- site side of the outer bag and the bottom flap upon the transverse folded side of the inner bag, informing a duplex bag of the type illustrated in the drawings.

It will be noted that the cutting blades are angularly disposed upon the peripheries of their respective rolls, relative to the axial line thereof, therebyforming an angular cut, preferably somewhat V-shaped in character, so as to project the edges of one side of both bags, at the open ends thereof, beyond that of the 0p osing side. This forms convenient means or opening the bagfor 151 represent the rejecting edges of one side of the outer an inner bags respectivel extending beyond the edge ofthe fia si es of the inner bag, with the ed e of the corres nding side of the outer ag-coincidently ormed. I Having described our invention, we claim 1. In a paper bag machine for'o erating upon individual blanks, a first blan folder and a first blank feeder operating simultaneously on the blank, a secondblank folder and a second blank feeder placed in rear of the first members and operating simultaneously on the blank, the feeders beingdisposed on opposite sides relative to the lank, and the folders being disposed on opposite sides relative to the' blank, whereby the blank is folded on one side and then on the other.

2. Ina paper ba machine of the class described, staggereddy disposed stationary folding means, staggeredly. disposed sets of feed rollers positively rotated and each set yieldingly maintained in contact with each other between which is fed a'stri of paper, whereby both sides of a strip 0 paper are in constant feeding engagement with the feeding means during the alternate side folding.

3. In a paper ba machine of the class described, staggeredgy disposed paper folding means, comprising spiral ways supported in the path of paper travel, pairs of coacting feed rolls disposed oppositely to said folding means in positive rotation for feeding the paper forward during the folding action along one end thereof, and guiding means, for guiding the paper to said folding and feeding means.

4. In a bag machine for making a duplex bag, of means for feeding, printing, and cutting the outside marginal edges of one strip of paper, and means for feeding and cutting a blank from a second strip of paper, in combination with means for simultaneously feeding the cut strip and blank together, one above the other, and simultaneously folding the same one within the other, and cutting the outer ba from the continuous strip prior to the fina folding thereof.

5. In a bag machine formaking a duplex bag, of means for feeding, printing and cutting the outside mar inal edges of one strip of. paper, and f ing and cutting a blank from a secondstr'i of paper, in combination with means or simultaneously feeding the same to a meeting point one above the other, means for simultaneously foiding the edges of both bags, one over the ot er.

6. In a machine for making a duplex bag 3 of transverse folds relative to each other, of

means for feeding,printing and cutting thev outside mar 'nal ed es of one strip of paper, and means or feeding and cutting a blank from a second strip of paper, combination with means for feeding the same simultaneously, one above the other, to the folding devices, and means for feeding the one in advance'of the other rior to the (folding operation to properly ine the same relative to each other, means for simultaneously folding and finishing the bag during the re- .mainder of its operation.

7. In a paper bag machine for making duplex bags in a contlnuous operation, a pair of cutting rolls for forming a marginal edge an outer bag blank after said duplex fold,

and means for folding said last named blank and delivering the duplex bag to a point of discharge.

8. In a machine for making a duplex bag having transverse folds relative to each other of means for feeding, printing and cutting the outside marginal edges of one strip of paper, and means for feeding, gumming and cutting a blank from asecond strip of paper, in combination with means for feeding the same simultaneously one above the other, folding devices for making parallel folds of both bags, one over the other,

' forming a center seam inner bag, and edge flaps for the outer bag, means for scoring said bags upon the medial line of one of them, and cutting the outer bag from its continuous strip, and means for olding one side of the outer bag upon its edge flaps and delivering the completed duplex bags to a point of discharge.

9. In a machine for making a duplex bag having transverse folds relative to each other, of means for feeding, printing and cutting the outside marginal edges of one strip of paper, and means for feeding, gumming and cutting a blank from a second strip of paper, in combination with means for feeding the same simultaneously one above the other, folding devices for making parallel folds of both bags one over the other orming a center seam inner bag and edge flaps for the outer bag, means for scoring said bags upon the medial line of one of them,

means for gumming the flaps of said outer bag, means for cutting the outer ba from a continuous strip, and means for folding one side of the outer bag upon the flaps and delivering the completed duplex bag to a point of discharge.

10. In a machine for making paper bags, a roll provided with cutting and scoring members upon the periphery thereof, two pairs of gripping fingers oppositely disposed, means for disengaging said fingers from said roll, moving the same vertically and horizontally in an axial line relative to saidroll to effect a release and engagement with said roll during predetermined points of its revolution.

11. In a machine for making paper bags, a cuttin and scoring roll, gripping means for holding the paper upon the periphery of said rolls during a portion 'of its rotation, comprising, a pair of arms traveling with the roll,-two pairs of slide blocks slidably mounted upon said arms and oppositely disposed relative to each other, gripping fingers fixed to said blocks, a stationary cam for governing the movement of said gripping fingers in vertical and horizontal axial lines relative to said roll, and a plunger fixed to each gripping finger block and engaging said stationary cam.

'In testimony whereof we have hereunto set our hands.

MATTHEW VIERENGEL. JOHN SOFGE, Witnesses:

OLIVER B. KAISER, LUISE BECK. 

